package com.dgl.sdk.util;

import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.GridView;
import android.widget.ListAdapter;
import android.widget.ListView;

public class AdaptListHeight {
	 
    public static  void setListViewHeightBasedOnChildren(ListView listView) {

           //获取ListView对应的Adapter

           ListAdapter listAdapter = listView.getAdapter(); 

           if (listAdapter == null) {

                  return;

           }

           

           int totalHeight = 0;

           for (int i = 0, len = listAdapter.getCount(); i < len; i++) {   //listAdapter.getCount()返回数据项的数目

                  View listItem = listAdapter.getView(i, null, listView);

                  listItem.measure(0, 0);  //计算子项View 的宽高

                  totalHeight += listItem.getMeasuredHeight();  //统计所有子项的总高度

           }
           

           ViewGroup.LayoutParams params = listView.getLayoutParams();

           params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));

           //listView.getDividerHeight()获取子项间分隔符占用的高度

           //params.height最后得到整个ListView完整显示需要的高度

           listView.setLayoutParams(params);

    }



}

